Manufacture of paper cartons.



R. FfARNOTT.

- MANUFACTURE OF PAPER CARTONS.

APPLICATION man MAR. 22.1913.

Patented Apr. 3, 1917.

2 SHEETS-SHEET 1- HHIIIFH 01% I @umkxiu. (11 115:

noEEETELEiiIne'AEivoT'n-or UPPER MONTCLAIR, NEW JERSEY, ASSIGNOR-TO I.L.

MYERS, on NEW YORK, E. Y.

MaEUEAc'rnEE 0E PAPER cannons.

To all whom it may concern."

Be it lmown that I, ROBERT F. ARNOTT, a subject of the King of GreatBritain, residing at Upper Montclair, in the county of Essex and Stateof New Jersey, have invented a new and useful Improvement in theManufacture of PaperCartons, of which the followin is a full, clear andexactdescription, re erence being had to the accompanying drawings,forming part of this specification, in which: f

Figure 1 is a sectional side elevation of one form of machine embodyingmy invention; and 1 ,Fig. 2 is a portion thereof on a 'larger scale.

Fig. 3 is a detail sectional view showing a portion of a two-ply paperband.

- My invention relates to the manufactureof paper cartons by windingpaper about a mandrel and cementing it in wound form. The object of theinvention is to make 3 the walls of the package stiffer and denser,

and reduce their tendency to soften in contactfwith liquid.

In the co-pending application] of C. C. Stutz and myself, No, 678,110filed Feb. 16, 1912, we describe a machine for this purpose. In suchmachine, the pa er whether singleor multiple ply isfed orward anddirected around the mandrel, the feeding forward being positive exceptfor the last end passing on to the mandrel.

'I have found that the character of the package is improved if aplurality of the last wraps are pulled on to'the mandrel by the windingaction thereof, as distinguished from feeding the paper forwardly ontoit. This pulling action for the last wraps draws the plies togethermore tightly and firmly so that the walls are stiffer, the cement ismore completely spread. and the tendency to soften under contact "withliquid is reduced.

In carrying out my invention, I preferably use a band ofpaper consistingof two or more plies or layers instead of .a single ply, althoughthe"invention may be' used with. a single ply; and by the words band orstrip" in my claims, I intend to cover downwardly, as shown by thearrow, around the idle roller 7, and thence upward in the direction ofthe arrow and over the idle roller 8 at the entrance to the heatedchamher 9. Within this heated chamber or box, 1t passes under the idlerollers 10, which are immersed in hot liquid paraflin contained in thetank 11. From this tank it passes between the feed rolls 1212 and thenceunder the cutting knife 13 to the mandrel 14. As the'strippasses fromthe feed rolls 12 to the mandrel 14, it rests upon suitable supports 15and is held against the mandrel by pressure roller 16.

feed rolls 12 and the mandrel, being secured to a pivoted link 18mounted on lever 20 fulcrumed at 21 on a rocking support 22 and guidedby pin 23 moving in slot guide 24. The roller at the rear end of thislever is actuated by a'cam 25 on shaft 26, driven through belt or chain'27.

In the operation of the machine, the con tinuous strip of paper,preferably of the multiple ply or layer form, is fed through theprinting rolls toprint any desired ma'tter thereon and thencepasses-into the heating chamber: Here it is' supplied with or soaked inhot liquid paraflin, either by pass- Specification of Letters Patent.Patented Aplfi 3 191%.. I I Appfieatio'n filed March 22, 1913. serialIto. 756,141.

i The cuttingknife 13 is hung between the I acertain number of turns ofpaper as it is wound on the mandrel. 'The feeding action of the feedrolls and printingrolls is then I stopped-while the mandrel continues tobe driven." In. this manner, the mandrel will pull uponitself the restof the wraps by drawing the paper band through the rolls and between theidle. rollers, etc.

, When the mandrel has thus wound up the desired number of turns, theknife is brought into action and'the paper out transversely. The

port on of the band back of the knife re- .mains stationary whilethemandrel winds up the remaining end, thus forming a complete cylinderwhich is removed by any desirable stripping action. After the removal ofthe wound cylinder from the mandrel,-

the feed rolls and printing rolls automatically start again and the nextlength of paper is fed forward tothe mandrel and the operation repeated.7

tomatically cut at the desired time. Thus,

in case it is desired to feed four wraps or turns upon the mandrel andpulltwo additional turns thereof-to give a cylinder of six wraps; theroll 5 may be made with its diameter four times the diameter of themandrel, its intermittent driving gearing being arranged to give it onecomplete revolution and then stop, while the mandrel continues torotate. When the printing rolls stop, the

point where the paper band will be later on cut with the knife will bein about the position marked K on the roll 5. The band orstrip will thenbe pulled forward by the mandrel until the point K arrives at thecutting point where it is cut. The length of paper from the point K tothe point L should be equal to the length to be pulled forward, or tothis length plus any number of lengths required to form a completecylinder. A surplus may also be'provided so that the outer end mayoverlap the inner end by any desired amount.

In carrying out this system, I find it of advantage to slightly depressthe lower feed roller 12 at about the time it ceases turning. In theform shown to carry out this movement I support the bearings of thisroller on springs 28 from which bearing rods 29 extend down to thecross-bar 30. This crossbar is acted upon by cam lever 31 having aroller 32 actuated by the cam 33. This cam slightly lifts the roller endof the lever at the proper time and depresses the'roller 12 as it stopsturning;

I also prefer to hold the band stationary while the knife is cutting it.For this purpose I show a slide '34 having a roller 35 actuated by cam36. The other end of this slide has a pivotal connection with the rocklever 37 fulcrumed at 38 and having a braking surface at 39 which isadapted to press upon the band. The cam 36 is so timed that it willdepress the brake against the band and while the knife is cutting theband.

Any suitable-gearing may be employed for effecting the intermittentdriving of the feeding and'printing rollers 5, 6 and 12, while the rolls5 and 6 maybe geared to each other so as to rotate'in unison. In thedrawings I have shown the machine as having a main driving shaft 40carrying a sprocket wheel '41 which drives a chain belt 42 through achain wheel 43 on the shaft 44. This shaft 44 carries a large spur gearwheel 45 which meshes with the pinion 46 on the shaft of the arbor. Theroller 5 is driven from the shaft 44 through a chain belt 47 on a chainwheel 48 carried by the shaft 49. On the shaft 49 is a mutilated gearwheel 50 which is arranged to mesh with a pinion 51 on the shaft of theprinting roller 5. This shaft also carries a chain wheel 52 driving abelt 53 which in turn drives the shaft of the upper roller 12. By meansof this gearing the mandrel 14 will be continuously driven while therollers 5, 6 and 12 will be driven only when the toothed portion of themutilated gear 50 is in engagement with the pinion 51.

Where a multiple strip or band is used, the multiple layers may be uponthe same supply roll, or 'a plurality of supply rolls may be used,each'containing one layer or P y from the pulling forward of the lastwrap or wraps in order to tighten and densify the walls and give astronger, stifi'er package. Air between thelayers is more thoroughlyforced out, the cementing material is more thoroughly spread among thelayers, and the tendency of the package to soften under contained liquidis greatly reduced.

The number of wraps fed forward and the number of wraps pulled on themandrel may be varied as desired, and many different forms of apparatusmay be used for carr ing out this result, since I consider mysel thefirst in winding cartons to feed the paper forward for a part of thewraps and then pull it on the mandrel for the succeedin wraps.

1. The method of forming stiff-walled paper cans, consisting in windingdirectly on a mandrel a plurality of wraps of paper, and finallystlifening the wall and consolidating the previously wound layers ofpaper by winding one or more final wraps under a tension considerablygreater than the first wraps, substantially as described.

2. The method of forming stiff-walled waterproof paper cans, "consistingin applying a waterproofing material to a strip of paper, winding aplurality of wraps of such waterproof strips directly around a mandrel,and finally stiffeningthe wall, consolidating the previously woundlayers and more completely spreading thewaterproofing material bywinding one or more final wraps under a tension considerably greater Theadvantages of my invention result 3. The method of forming stiff-walledwaterproofed paper cans, consistin in satuand finally stiffening theWall, consolidating the previously Wound layers and more completelyspreading thev parafiin by Winding one or more final wraps forming theouter plies of the can under a considerable tension, substantially asdescribed.

i In testimony whereof, I have hereunto set my hand.

ROBERT FLEMING Witnesses:

GERTRUDE C'HAPIN, HERMAN E. SUPHAN,

ARNOTT.

